vidar | f8b60e554ed303e2debe7422bb363dcc33ace171d02388bce2e8ab5ce5364f5d

Analysis

max time kernel
129s
max time network
137s
platform
windows10_x64
resource
win10v20210410
submitted
14/07/2021, 15:15

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General

Target
197f5a4cb71e38ea7b56bd1214fbbfc7.exe
Size 729KB
Sample210714-vbja2c8phj
SHA256 f8b60e554ed303e2debe7422bb363dcc33ace171d02388bce2e8ab5ce5364f5d
MD5 197f5a4cb71e38ea7b56bd1214fbbfc7
SHA1 8e1500730abd3e46bce284bc098d541c6d8d5088
SHA512 a3116cb0f4048875ed62b646438c8b5872ff35fd29249ab73a865deb89edb47bc4245b786e27979e259dc91188b24e995d60c3685c639e300395b7c675d9ec96
MD5 SHA1 SHA512

Score

10^/10

vidar 517 discovery persistence ransomware spyware stealer

Malware Config

Extracted

Path

C:\_readme.txt

Ransom Note

ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-tkon5qUcfl Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0316ewgfDdOcMcAt2OQZqFzJadYhow9MqoFd992adkvAnhUo2b

Emails

URLs

https://we.tl/t-tkon5qUcfl

Extracted

Family

vidar

Version

39.5

Botnet

https://olegf9844.tumblr.com/

Attributes

profile_id
517

Signatures

Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar

Vidar Stealer 4 IoCs

stealer

resource	yara_rule
behavioral2/memory/3516-131-0x0000000000400000-0x00000000004A1000-memory.dmp	family_vidar
behavioral2/memory/3516-132-0x000000000046B76D-mapping.dmp	family_vidar
behavioral2/memory/488-134-0x0000000000E20000-0x0000000000EBE000-memory.dmp	family_vidar
behavioral2/memory/3516-135-0x0000000000400000-0x00000000004A1000-memory.dmp	family_vidar

Downloads MZ/PE file

Executes dropped EXE 4 IoCs

pid	Process
488	build2.exe
3516	build2.exe
1292	197f5a4cb71e38ea7b56bd1214fbbfc7.exe
3592	197f5a4cb71e38ea7b56bd1214fbbfc7.exe

Modifies extensions of user files 3 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\ConvertConnect.tiff => C:\Users\Admin\Pictures\ConvertConnect.tiff.gujd	197f5a4cb71e38ea7b56bd1214fbbfc7.exe
File renamed	C:\Users\Admin\Pictures\FormatRemove.png => C:\Users\Admin\Pictures\FormatRemove.png.gujd	197f5a4cb71e38ea7b56bd1214fbbfc7.exe
File opened for modification	C:\Users\Admin\Pictures\ConvertConnect.tiff	197f5a4cb71e38ea7b56bd1214fbbfc7.exe

Loads dropped DLL 2 IoCs

pid	Process
3516	build2.exe
3516	build2.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1296	icacls.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Accesses 2FA software files, possible credential harvesting 2 TTPs
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\242bac1e-7c80-4375-98f8-f8dd954df936\\197f5a4cb71e38ea7b56bd1214fbbfc7.exe\" --AutoStart"	197f5a4cb71e38ea7b56bd1214fbbfc7.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Looks up external IP address via web service 4 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
11	api.2ip.ua
20	api.2ip.ua
37	api.2ip.ua
9	api.2ip.ua

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 476 set thread context of 3028	476	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	76
PID 2824 set thread context of 2120	2824	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	82
PID 488 set thread context of 3516	488	build2.exe	85
PID 1292 set thread context of 3592	1292	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	91

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	build2.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	build2.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3848	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
2416	taskkill.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349	197f5a4cb71e38ea7b56bd1214fbbfc7.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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	197f5a4cb71e38ea7b56bd1214fbbfc7.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

pid	Process
3028	197f5a4cb71e38ea7b56bd1214fbbfc7.exe
3028	197f5a4cb71e38ea7b56bd1214fbbfc7.exe
2120	197f5a4cb71e38ea7b56bd1214fbbfc7.exe
2120	197f5a4cb71e38ea7b56bd1214fbbfc7.exe
3516	build2.exe
3516	build2.exe
3516	build2.exe
3516	build2.exe
3516	build2.exe
3516	build2.exe
3516	build2.exe
3516	build2.exe
3592	197f5a4cb71e38ea7b56bd1214fbbfc7.exe
3592	197f5a4cb71e38ea7b56bd1214fbbfc7.exe
2120	197f5a4cb71e38ea7b56bd1214fbbfc7.exe
2120	197f5a4cb71e38ea7b56bd1214fbbfc7.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2416	taskkill.exe

Suspicious use of WriteProcessMemory 56 IoCs

description	pid	Process	procid_target
PID 476 wrote to memory of 3028	476	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	76
PID 476 wrote to memory of 3028	476	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	76
PID 476 wrote to memory of 3028	476	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	76
PID 476 wrote to memory of 3028	476	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	76
PID 476 wrote to memory of 3028	476	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	76
PID 476 wrote to memory of 3028	476	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	76
PID 476 wrote to memory of 3028	476	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	76
PID 476 wrote to memory of 3028	476	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	76
PID 476 wrote to memory of 3028	476	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	76
PID 476 wrote to memory of 3028	476	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	76
PID 3028 wrote to memory of 1296	3028	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	77
PID 3028 wrote to memory of 1296	3028	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	77
PID 3028 wrote to memory of 1296	3028	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	77
PID 3028 wrote to memory of 2824	3028	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	78
PID 3028 wrote to memory of 2824	3028	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	78
PID 3028 wrote to memory of 2824	3028	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	78
PID 2824 wrote to memory of 2120	2824	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	82
PID 2824 wrote to memory of 2120	2824	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	82
PID 2824 wrote to memory of 2120	2824	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	82
PID 2824 wrote to memory of 2120	2824	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	82
PID 2824 wrote to memory of 2120	2824	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	82
PID 2824 wrote to memory of 2120	2824	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	82
PID 2824 wrote to memory of 2120	2824	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	82
PID 2824 wrote to memory of 2120	2824	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	82
PID 2824 wrote to memory of 2120	2824	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	82
PID 2824 wrote to memory of 2120	2824	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	82
PID 2120 wrote to memory of 488	2120	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	84
PID 2120 wrote to memory of 488	2120	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	84
PID 2120 wrote to memory of 488	2120	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	84
PID 488 wrote to memory of 3516	488	build2.exe	85
PID 488 wrote to memory of 3516	488	build2.exe	85
PID 488 wrote to memory of 3516	488	build2.exe	85
PID 488 wrote to memory of 3516	488	build2.exe	85
PID 488 wrote to memory of 3516	488	build2.exe	85
PID 488 wrote to memory of 3516	488	build2.exe	85
PID 488 wrote to memory of 3516	488	build2.exe	85
PID 488 wrote to memory of 3516	488	build2.exe	85
PID 3516 wrote to memory of 2828	3516	build2.exe	86
PID 3516 wrote to memory of 2828	3516	build2.exe	86
PID 3516 wrote to memory of 2828	3516	build2.exe	86
PID 2828 wrote to memory of 2416	2828	cmd.exe	88
PID 2828 wrote to memory of 2416	2828	cmd.exe	88
PID 2828 wrote to memory of 2416	2828	cmd.exe	88
PID 2828 wrote to memory of 3848	2828	cmd.exe	89
PID 2828 wrote to memory of 3848	2828	cmd.exe	89
PID 2828 wrote to memory of 3848	2828	cmd.exe	89
PID 1292 wrote to memory of 3592	1292	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	91
PID 1292 wrote to memory of 3592	1292	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	91
PID 1292 wrote to memory of 3592	1292	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	91
PID 1292 wrote to memory of 3592	1292	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	91
PID 1292 wrote to memory of 3592	1292	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	91
PID 1292 wrote to memory of 3592	1292	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	91
PID 1292 wrote to memory of 3592	1292	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	91
PID 1292 wrote to memory of 3592	1292	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	91
PID 1292 wrote to memory of 3592	1292	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	91
PID 1292 wrote to memory of 3592	1292	197f5a4cb71e38ea7b56bd1214fbbfc7.exe	91

C:\Users\Admin\AppData\Local\Temp\197f5a4cb71e38ea7b56bd1214fbbfc7.exe
"C:\Users\Admin\AppData\Local\Temp\197f5a4cb71e38ea7b56bd1214fbbfc7.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:476
- C:\Users\Admin\AppData\Local\Temp\197f5a4cb71e38ea7b56bd1214fbbfc7.exe
  "C:\Users\Admin\AppData\Local\Temp\197f5a4cb71e38ea7b56bd1214fbbfc7.exe"
  2⤵
  - Adds Run key to start application
  - Modifies system certificate store
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3028
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\242bac1e-7c80-4375-98f8-f8dd954df936" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1296
- - C:\Users\Admin\AppData\Local\Temp\197f5a4cb71e38ea7b56bd1214fbbfc7.exe
    "C:\Users\Admin\AppData\Local\Temp\197f5a4cb71e38ea7b56bd1214fbbfc7.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2824
  - - C:\Users\Admin\AppData\Local\Temp\197f5a4cb71e38ea7b56bd1214fbbfc7.exe
      "C:\Users\Admin\AppData\Local\Temp\197f5a4cb71e38ea7b56bd1214fbbfc7.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Modifies extensions of user files
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of WriteProcessMemory
      PID:2120
    - - C:\Users\Admin\AppData\Local\e57b608a-0200-4eb5-97b1-541b5743424b\build2.exe
        
        "C:\Users\Admin\AppData\Local\e57b608a-0200-4eb5-97b1-541b5743424b\build2.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious use of WriteProcessMemory
        
        PID:488
      - C:\Users\Admin\AppData\Local\e57b608a-0200-4eb5-97b1-541b5743424b\build2.exe
        
        "C:\Users\Admin\AppData\Local\e57b608a-0200-4eb5-97b1-541b5743424b\build2.exe"
        6⤵
        Executes dropped EXE
        Loads dropped DLL
        Checks processor information in registry
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of WriteProcessMemory
        
        PID:3516
        
        C:\Windows\SysWOW64\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\e57b608a-0200-4eb5-97b1-541b5743424b\build2.exe" & del C:\ProgramData\*.dll & exit
        7⤵
        Suspicious use of WriteProcessMemory
        
        PID:2828
        
        C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im build2.exe /f
        8⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2416
        
        C:\Windows\SysWOW64\timeout.exe
        
        timeout /t 6
        8⤵
        Delays execution with timeout.exe
        
        PID:3848

C:\Users\Admin\AppData\Local\242bac1e-7c80-4375-98f8-f8dd954df936\197f5a4cb71e38ea7b56bd1214fbbfc7.exe
C:\Users\Admin\AppData\Local\242bac1e-7c80-4375-98f8-f8dd954df936\197f5a4cb71e38ea7b56bd1214fbbfc7.exe --Task
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1292
- C:\Users\Admin\AppData\Local\242bac1e-7c80-4375-98f8-f8dd954df936\197f5a4cb71e38ea7b56bd1214fbbfc7.exe
  C:\Users\Admin\AppData\Local\242bac1e-7c80-4375-98f8-f8dd954df936\197f5a4cb71e38ea7b56bd1214fbbfc7.exe --Task
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  PID:3592

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

T1222

Install Root Certificate

T1130

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/476-116-0x0000000004A50000-0x0000000004B6B000-memory.dmp

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memory/488-134-0x0000000000E20000-0x0000000000EBE000-memory.dmp

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memory/2120-127-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3028-114-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3028-117-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3516-135-0x0000000000400000-0x00000000004A1000-memory.dmp

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memory/3516-131-0x0000000000400000-0x00000000004A1000-memory.dmp

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memory/3592-151-0x0000000000400000-0x0000000000537000-memory.dmp

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